http://book.klll.cc/ebooks/subject/890.opds?sort_order=release_date 2025-11-18T09:13:34Z Books about Astronomers Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-18T09:13:34Z https://book.klll.cc/ebooks/28613.opds Pioneers of Science Sir Oliver Lodge 2025-11-18T09:13:34Z https://book.klll.cc/ebooks/2298.opds Great Astronomers Robert S. Ball